You can collect a Mystery Chest once the you have 100 Vision Vapour, an icon will appear, prompting you to collect.
If you run short of Spell fragments for crafting, you can disenchant things into Spell fragments...click on the green + button.
The Magic Academy is, to me, an awesome building. Upgrading it to the maximum will reduce production time for Catalysts, etc.
More information on the Magic Academy can be found here:
If a quest is asking you to collect Vision Vapour you don't need to have 100 of it. You are collecting it with each object you've crafted in the Magic Academy, sometimes as little as 1 at a time.
If a quest is asking you to collect Vision Vapour you don't need to have 100 of it. You are collecting it with each object you've crafted in the Magic Academy, sometimes as little as 1 at a time.